Electric interlocking handbook
By: by the Engineering staff of the General railway signal company, with an introduction by Wilmer W. Salmon. Henry M. Sperry, editor; Paul E. Carter, assistant editor; Sherman A. Benedict, illustrator.
Contributors: Sperry, Henry Muhlenberg, 1861-; Carter, Paul Epler, 1886-
Publisher: General railway signal company
Published: 1913
Place of publication: Rochester, N.Y
Language: eng
Number of pages: 435
Subjects: Railroads -- Signaling -- Interlocking systems